https://communities.vmware.com/thread/521041 http://www.helloitscraig.co.uk/2015/10/mapping-a-vcacentity-machine-prefix-to-a-vcaccafemachineprefix.html
/*
input: vCACMachinePrefixEntity [vCAC:Entity
input: vCACCAFEHost [vCACCAFE:vCACHost]
output: vCACCAFEMachinePrefixObject [vCACCAFE:MachinePrefix]
Description: Maps a vCAC:Entity machine prefix to a vCACCAFEMahcinePrefix object
*/
var vCACCAFEMachinePrefixEntityName = vCACMachinePrefixEntity.getProperty('MachinePrefix');
var vCACCAFEMachinePrefixArray = vCACCAFEEntitiesFinder.findMachinePrefixes(vCACCAFEHost,vCACCAFEMachinePrefixEntityName);
vCACCAFEMachinePrefixObject = vCACCAFEMachinePrefixArray[0];
return vCACCAFEMachinePrefixObject;